import processing.sound.*;
SoundFile chompSound;
int radius = 40;
float x = -radius;
float speed = 0.5;

void setup() {
  size(240, 120);
  ellipseMode(RADIUS);
  chompSound = new SoundFile(this, "pacman_chomp.mp3");
}

void draw() {
  background(0);
  x += speed; // Increase the value of x
  if (x > width+radius) { 
    speed = -speed; 
    chompSound.play();
  }
  if (x < -radius) {
    speed = -speed;
    chompSound.play();
  }
  arc(x, 60, radius, radius, 0.52, 5.76);
}